diff --git a/pkg/openai/keymgr.py b/pkg/openai/keymgr.py
index 2c724a0b..8163999c 100644
--- a/pkg/openai/keymgr.py
+++ b/pkg/openai/keymgr.py
@@ -72,7 +72,7 @@ class KeysManager:
         md5 = hashlib.md5(self.using_key.encode('utf-8')).hexdigest()
         if md5 not in self.usage:
             self.usage[md5] = 0
-        self.usage[md5] += int((len(new_content.encode('utf-8')) - len(new_content))/2 + len(new_content))
+        self.usage[md5] += int((len(new_content.encode('utf-8')) - len(new_content)) / 2 + len(new_content))
 
         if self.usage[md5] >= self.api_key_usage_threshold:
             switch_result, key_name = self.auto_switch()
@@ -96,4 +96,5 @@ class KeysManager:
 
     def load_usage(self):
         self.usage = pkg.database.manager.get_inst().load_api_key_usage()
-        logging.debug("load usage:" + str(self.usage))
\ No newline at end of file
+        logging.debug("load usage:" + str(self.usage))
+        print("load usage:" + str(self.usage))